Wavelength dependence of 4-dimethylamino-4′-nitrostilbene polymer thin film photodegradation | Zendy

Qiang Zhang | Zendy; Michael Canva | Zendy; George I. Stegeman | Zendy

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Wavelength dependence of 4-dimethylamino-4′-nitrostilbene polymer thin film photodegradation

Author(s) -

Qiang Zhang,

Michael Canva,

George I. Stegeman

Publication year - 1998

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.122035

Subject(s) - photodegradation , chromophore , photochemistry , wavelength , materials science , absorption (acoustics) , excited state , optoelectronics , infrared , visible spectrum , photodissociation , polymer , quantum yield , optics , chemistry , photocatalysis , fluorescence , atomic physics , physics , organic chemistry , catalysis , composite material

International audienceThe polymeric electro-optical stilbene material, 4-dimethylamino-4' -nitrostilbene ~DANS), was illuminated at wavelengths ranging from the visible to near-infrared in order to quantify its photodegradation processes. Photodegradation due to one-photon and two-photon absorption was studied. The quantum efficiency of the chromophore degradation is found to be strongly wavelength and absorption mechanism dependent. This suggests that, in different regions of the spectrum, different excited states or different mechanisms are involved in the degradation process. In the near-infrared spectral region, operation lifetimes of electro-optic devices made from this chromophore are expected to be around only few hundreds hours, dramatically shorter than it was previously believe

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